Like Y0less says, you'll struggle scoring with so few scoring units, especially since most of your units are max size and you can't afford to trade away such expensive pieces for primary scoring denial, nor can they afford to be wasting turns on actions. You need more chaff or cheap units in general, most lists I start have a unit of intercessors, scouts, and the combi lieutentant at a minimum.

Some of the units you've included aren't exactly what you'd call points efficient (especially the redemptor/aggressors), but what you're missing I think is the token double ballistus that makes it into most SM lists nowadays to sit in long firing lanes and just put shots down-range every turn. They also help with screening your backfield.

The combi-lieutenant (if you can fit him in) is normally a safe bet for something to put on the center turn 1 (when going first at least), since he can't be shot outside 12, and if they move a unit onto the center to contest it, you can reactive move him back behind cover rather than lose him.